The 27-year-old actress tweeted a a teaser photo to her 4.1 million followers, under the caption, "Eye to eye we face our fears, unarmed on the battlefield," as the audio clip was released to her Vevo account.

Earlier this month, the heartbroken star appeared on American television for the first time since the tragedy and admitted she was still struggling to come to terms with her loss.

She also confessed the couple, who hid their relationship from the public, had been an item while on the show.

Talking to chat host Ellen DeGeneres, Lea said: “It's one of my favourite memories. I remember when he came home that night he kind of puffed out his chest and he was like, "I talked about you on Ellen today.

Getty

“I was so happy. He's such a private person and I literally lived everyday of my life feeling like the luckiest girl in the whole world.

“I just thought he was the greatest man and so at that moment, that memory, it means so much to me.”

She added: “I really feel like I'm still trying to figure out all of this.

“It's been only a few months, but my mom has experienced a lot of loss in her life and she told me at one point, she said, there is an empowerment that comes with grief, at some point you find it.

“It's very hard but you will find it and I think at a certain point you can choose to sort of fall from this or you can choose to rise.

“And that’s what I'm just trying to do my best for him because I know that that's what he would have wanted, and to just do my best and to you know, hopefully make something positive for where I go in the rest of my life.”